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黄土湿陷试验方法主要有室内试验和现场浸水试验两种:室内试验方法,大部分情况试验结果很难反映工程实际;现场浸水试验,试验周期长,费用昂贵,因此需要另辟蹊径。以新疆伊犁强烈自重湿陷性黄土为对象,开展了湿陷特性的离心模型试验,并将离心模型试验成果与现场浸水试验成果以及室内试验成果进行了对比,提出了一个基于离心模型试验的黄土湿陷试验新方法。研究表明:黄土湿陷的离心模型试验同样可以采用双线法和单线法进行,离心模型试验得到的侧压力系数变化规律同室内试验得到的侧压力系数变化规律相一致,通过离心模型试验求得的修正系数β_0值与现场浸水试验得到的值相近,证明了基于离心模型试验的黄土湿陷试验新方法可以得到与现场大型浸水试验相近的结果。
The loess collapsibility test methods are mainly indoor test and field immersion test: indoor test method, most of the test results are difficult to reflect the actual project; on-site immersion test, the test cycle is long, expensive, so need another way. Centrifugal model test of collapsible loess with heavy weight is carried out in Xili, Xinjiang. The centrifuge model test is compared with the results of in-situ immersion test and laboratory test. A loess model based on centrifugal model test New method of collapsible test. The results show that the centrifugal model test of loess collapsing can also be carried out by the double line method and the single line method. The variation law of the lateral pressure coefficient obtained by the centrifuge model test is consistent with the variation law of the lateral pressure coefficient obtained by the indoor test. The centrifugal model test The correction coefficient β_0 is close to that of in-situ immersion test, which proves that the new method of loess collapsibility test based on the centrifugal model test can get the result similar to the large-scale immersion test in the field.